Reconstructing the picture as suggested by Dave would be better. If you want to make the background white or transparent, you have to modify the picture itself, e.g. by using The Gimp or equivalent software. Depending on color dithering, it could be more or less complicated
–
Lionel MANSUYJan 22 '13 at 8:48

1 Answer
1

I agree with Dave which suggest to directly draw the picture with TikZ: on the site you will find lots of starting points (one could be define one style module customizable for the colors and then use a matrix to position the nodes, or just place them via the positioning library - perhaps someone will post another answer).

I prefer another way because this is something that could be done easily also in a object-oriented fashion. The problem, or the beauty of the approach (I see it more in this way), is that one should implement itself all.

The code is commented, so it is possible to follow the reasoning behind.

O.K., now I install print/latex-beamer port on the FreeBSD machine and compile your example. I get error like this: No file mclinker-2013-chenwj.aux. ... No file mclinker-2013-chenwj.nav. ... ! Package xcolor Error: Undefined color lime. What should I do? Install the missing color or the error comes from elsewhere?
–
chenwjJan 23 '13 at 4:02